275 results about "Peroxydisulfate" patented technology

The invention relates to a drilling fluid plugging agent while drilling, comprising 60-100 parts of plant fibers, 5-20 parts of asphalt, 5-15 parts of graphite and 5-20 parts of weak water absorbent gel by weight. The weak water absorbent gel is a polymer which has mean grain size of 200-20 meshes and water absorbent multiple of 10-100g.g-1 and is prepared by reacting 20-60 parts of monomer, 0.05-1.0 part of potassium peroxydisulfate, 0.05-1.0 part of sodium bisulfite, 0.005-0.5 part of methylene-bis-acrylamide and 2-10 parts of inorganic fillers by weight under constant temperature of 20-60 DEG C for 8-12h by way of aqueous solution polymerization, drying and pelleting, wherein the polymeric monomer is one or more of acrylamide, acrylic acid, dimethyl diallyl ammonium chloride and 2-acrylamide-2-methyl propanesulfonic acid. The plugging agent has little effect on the rheological property of the drilling fluid, can reduce the API filtration and the coefficient of friction resistance of the drilling fluid in an auxiliary manner and is suitable for controlling leakage of and plugging the windows with high density and narrow pressure.

The invention discloses a preparation method of a back lining material used as the back lining of carpets, more particularly relates to a preparation method of the carpets and carboxylic styrene butadiene latex. Butadiene and cinnamene are taken as main monomers, then functional monomers and auxiliary monomers are added, anion emulsifier and non-ionic emulsifier are used complexly, pyrolysis type persulfates of potassium peroxydisulfate water solution or ammonium persulfate water solution, etc. are used as activator, n-dodecylmercaptan is used as molecular weight regulator, a batch feeding or dropwise feeding way is adopted, and vacuum flashing desaeration is used for composing the environment protection carboxylic styrene butadiene latex used as the backing lining of carpets. The carboxylic styrene butadiene latex prepared by the method has good elasticity and enduring performance, high adhesion strength and low volatility harmful substances after being used in woven carpets and tufted carpets, thereby being a green environment protection product upon meeting the requirements of environment protection.

The invention discloses a flotation method of a brass ore-containing complex lead-zinc sulphide ore, which comprises the steps of: adjusting the pH value to be 10-11 in the process of ore grinding; adding ore pulp electric potential regulating agent-sodium pyrosulfite to adjust the electric potential of the ore pulp to be at 220-260mV (relative to hydrogen standard potential); adding zinc sulfate, ethoxy-dithioformicacid ethyl formate and ethyl thio carbamate grinding ore; performing one roughing, one scavenging and two selecting to enrich copper-lead mineral by means of mixing and floating and to form into copper-lead mixed concentrate; performing reagent desorption to the copper-lead mixed concentrate by adding active carbon; adding potassium peroxydisulfate and carboxymethyl starch to restrain lead-containing mineral in the copper-lead mixed concentrate such as galena and the like; performing one roughing, one scavenging and three selecting to obtain copper concentrate; adjusting the pH value of tailings after recovering copper mineral by floating the copper-lead mixed concentrate to be 9.0; adding sodium pyrosulfite, ethyl thio carbamate and butyl ether alcohol; and performing one roughing, one scavenging and two selecting to obtain lead concentrate. The method guarantees the grade of the copper and the lead concentrate, and reduces the environmental pollution.

The invention relates to a preparing method ofa nano-magnetic polymer composite microsphere, which comprises the following steps: preparing a hydrophilic Fe3O4 magnetic liquid particle by using a chemical co-precipitation method; dissolving initiating agents and emulsifying agents by weight part into ionized water to prepare water phase, adding the hydrophilic Fe3O4 magnetic liquid particle and adding a monomer to obtain nano-magnetic seed emulsion through polymerization; dissolving initiating agents by weight part into ionized water, adding the nano-magnetic seed emulsion and then adding a monomer to obtain nano-magnetic polymer composite microsphere emulsion through polymerization; the emulsifying agents are sodium lauryl sulfate, sodium dodecyl sulfate or sodium dodecyl benzene sulfonate; the initiating agents are potassium peroxydisulfate, ammonium persulphate or sodium peroxydisulfate; the initiating agents are potassium peroxydisulfate, ammonium persulphate or sodium peroxydisulfate; the hydrophobic monomer is styrene or methyl methacrylate or a mixture of the styrene and the methyl methacrylate; the nano-magnetic polymer composite microspheres prepared by adopting a seed emulsion polymerization method have the superparamagnetism, have stronger magnetic responsiveness, have no uncoated magnetic particle and contain magnetic polymer microspheres and are narrow to distribute.

The invention discloses a method for preparing citrate nano zero-valent iron and a method of activated persulfate thereof for treating organic wastewater. The method for treating organic wastewater comprises the following steps: adding persulfate and stable citrate nano zero-valent iron into wastewater containing organic pollutants; uniformly mixing the stable citrate nano zero-valent iron with the persulfate, wherein the stable citrate nano zero-valent iron releases ferrous ions to react with zero-valent iron and the persulfate to generate free radicals with oxidizability, the free radicals degrade the organic pollutants in the wastewater, and the method is used for solving the problem in the prior art that activating conditions of activating the persulfate via heating activation and optical radiation activation are complicated; when the ferrous ions are used for activating the persulfate, the ferrous ions react with the active free radicals to reduce the utilization rate of peroxydisulfate and generate a large amount of iron sludge; the technical problem that the nano zero-valent iron is unlikely to recover when the nano zero-valent iron is used for activating the persulfate is at least partially overcome.

The invention discloses a method for preparing a binder resin for water-based ink and application thereof. The method comprises the following steps of: reacting polyester and / or polyether polyol, an ionized reagent and diisocyanate to prepare a prepolymer with NCO content of between 4 and 5 percent; dissolving a chain extender in cold water, and adding the mixture into the prepolymer under the stirring to obtain a polyurethane emulsion; stirring the obtained polyurethane emulsion, 28 percent ammonia water, deionized water and a thickening agent evenly to obtain an aqueous emulsion; and mixing methyl methacrylate, butyl acrylate, acrylic acid, acrylamide, sodium dodecyl sulfate and potassium peroxydisulfate with the aqueous emulsion to obtain the resin for the water-based ink. The method ensures that the water-based ink prepared by the obtained binder resin can be used for various plastic substrates and has excellent adhesion and good wetting property for polar and nonpolar substrates by synthesizing acrylic acid modified aqueous polyurethane, utilizing the temperature resistance and the flexibility of polyurethane, and introducing acrylic acid chain segments in a molecular structure at the same time.

The invention relates to an organic metal framework derived cobalt / nitrogen carbon nano material as well as a preparation method and application thereof. The preparation method comprises the followingspecific steps: (1) stirring and dissolving Co(NO3)<2>.6H2O in methanol to prepare a Co(NO3)2 solution; stirring and dissolving 2-methylimidazole in methanol to prepare a 2-methylimidazole solution;pouring the 2-methylimidazole solution into the Co(NO3)2 solution, standing and aging the mixture at room temperature, centrifuging the mixture, and washing and drying a product to obtain ZIF-67; and(2) carrying out annealing treatment on the ZIF-67 obtained in the step (1), and carrying out acid pickling, water washing and drying to obtain the cobalt / nitrogen carbon nano material. Compared withthe prior art, the cobalt / nitrogen carbon material prepared by the method has the advantages of low metal dissolution, good reusability, a simple and convenient operation process, a wide pH application range and the like when being used for activating peroxydisulfate, and has wide application prospects in the field of treatment of degradation-resistant organic matter wastewater.

A polishing composition for a memory hard disk, which comprises the following components (a) to (d):(a) from 0.1 to 50 wt %, based on the total amount of the polishing composition, of at least one abrasive selected from the group consisting of silicon dioxide, aluminum oxide, cerium oxide, zirconium oxide, titanium oxide, silicon nitride and manganese dioxide,(b) from 0.001 to 10 wt %, based on the total amount of the polishing composition, of at least one iron salt selected from the group consisting of iron nitrate, iron sulfate, ammonium iron sulfate, iron perchlorate, iron chloride, iron citrate, ammonium iron titrate, iron oxalate, ammonium iron oxalate and an iron chelate complex salt of ethylenediaminetetraacetic acid,(c) from 0.01 to 30 wt %, based on the total amount of the polishing composition, of at least one peroxydisulfate salt selected from the group consisting of ammonium peroxydisulfate, potassium peroxydisulfate and sodium peroxydisulfate, and(d) water.

The invention discloses a quaternary polymeric form corrosion and scale inhibitor which consists of maleic anhydride, hydroxy-propyl acrylate, acrylic acid, sodium alkyl sulfonate, sodium peroxydisulfate, sodium hypophosphite, isopropyl alcohol and water. The invention also discloses a preparation method of the quaternary polymeric form corrosion and scale inhibitor. The corrosion and scale inhibitor has good performance in inhibiting calcium carbonate scale, calcium sulphate scale, calcium phosphate scale and zinc scale and good dispersing performance for dispersing ferric oxide and is also characterized by corrosion resistance, high temperature resistance, stable molecule structure and low phosphorus content; the whole production process has no emission of 'the three wastes'. The technique of the product of the invention for treating circular cooling water is simple and the product of the invention has the advantages of little dosage, low cost, good effect and good economic benefit and wide social benefit.

The invention belongs to the technical field of methods for preparing polycarboxylic acid water reducers. A method for preparing a polycarboxylic acid water reducer comprises the following: a step 1 of esterification, in which a poly(ethylene glycol methyl ether)acrylate macromonomer is synthesized by using methoxy polyethylene glycol and acrylic acid in a molar ratio of 1:1.1 to 1:1.5 at 100 to 120 DEG C, water is separated out in a reaction process, and the molecular weight of the macromonomer is 1,250 to 3,000; and a step 2 of polymerization, in which aqueous solution of the macromonomer is prepared, an unsaturated monomer and a catalyst A are added in turn at 40 to 50 DEG C, the temperature is kept constant at 28 to 40 DEG C, aqueous solution of anhydrous sodium hydrogensulfite or vitamin c is dripped, the concentration of a solid content is kept between 35 to 45 percent by adjusting water content, stirring is stopped, and the solution is allowed to stand for 1 to 1.5 hours, the pH value is kept between 6 and 8 by alkaline reagent after the reaction is finished, and the catalyst A is peroxyacetic acid or potassium peroxydisulfate. The invention has the advantages of low cost, simple process and high product performance.

The invention relates to a manufacturing method of a compound type super absorbent resin. The manufacturing method provided by the invention comprises the following steps: pre-processing wheat straws, modifying sodium bentonite by cetyltrimethylammonium bromide, performing copolymerization on the pre-processed wheat straws, the modified bentonite, crylic acid and acrylamide to form the super absorbent resin; collecting a potassium peroxydisulfate solution, an eerie ammonium nitrate solution and a sodium sulfite solution as a compound initiator; and using N-N-methylene diacrylamide as a cross linker. The manufactured compound type super absorbent resin is low in cost and good in water absorbability and salt tolerance, and is applicable in a pH value ranging from 6-10, so that the manufacturing method provided by the invention can be widely applied in the industrial and agricultural production.

The invention relates to a cellulose based water-absorbing and oil-absorbing material and a preparation method of the cellulose based water-absorbing and oil-absorbing material, belonging to the technical field of high polymer materials. The preparation method comprises the following steps: methyl cellulose after being activated is taken as a substrate, acrylic amide and butyl methacrylate are taken as a polymerization monomer, potassium peroxydisulfate is taken as an initiator, N, N'-methylene-bisacrylamide is taken as a cross-linking agent, polyvinylpyrrolidone is taken as a dispersing agent, and the cellulose based water-absorbing and oil-absorbing material is prepared under a condition of no nitrogen through a suspension polymerization method. The cellulose based water-absorbing and oil absorbing material is environment-friendly and biodegradable, the reaction process is simple, the comprehensive cost is low, and the polymerization product still keeps the original appearance characteristics of the cellulose, so that the material can solve the problem that the common water absorbing and oil absorbing material can not absorb water and oil and can not be biodegradable, and has important significance for expanding the application field.

The invention discloses a high-quantum-yield electrochemical luminous gold nanometer cluster probe prepared by an electrochemical reduction method. The electrochemiluminescence gold nanometer cluster probe uses a functional gold nanometer cluster material as a precursor; then, an electrochemical method is used for reduction treatment. The electrochemiluminescence gold nanometer cluster probe is modified on an electrode; peroxydisulfate ions are used as a co-reaction agent; good electrochemical luminous performance is realized. The cluster probe has the characteristics that the preparation method is simple; the reaction conditions are mild; the reproducibility is good; the probe electrochemiluminescence signal intensity is high; the quantum yield is high, and the like. Along with the rapid development of an electrochemiluminescence sensor technology, the condition that the probe has great significance in the fields of chemistry, biology, medicine, environment and the like can be expected.

The invention relates to an attapulgite grafted polymethyl methacrylate hybrid particle and a preparation method thereof, and provides a hybrid particle which is prepared by taking methyl methacrylate and attapulgite clay as main raw materials, high in grafting rate and subjected to organic-inorganic connection by using chemical bonds. According to the invention, in accordance with a 'surface induced grafting' principle, an oxidation-reduction initiating system is formed by using attapulgite with amino and peroxydisulfate particles in aqueous phases, so that a graft polymerization reaction occurs on the surface of attapulgite, and then the attapulgite grafted polymethyl methacrylate hybrid particle is prepared. The preparation method of the hybrid particle, disclosed by the invention, is a soap-free emulsion method which can prevent the homopolymerization and reaction of monomers in low-polymer micelles in aqueous phases to the maximum extent, so that the monomers mainly take attapulgite particles as initial micelles for carrying out surface graft polymerization reaction. The polymer grafting rate of the prepared attapulgite grafted polymethyl methacrylate hybrid particle can reach 29.36%.

The invention discloses a pure acrylic emulsion modified by inorganic nanoparticles and a preparation method thereof. The pure acrylic emulsion modified by the inorganic nanoparticles comprises the following compositions in percentage by mass: 45 to 58 percent of deionized water, 20 to 30 percent of methyl methacrylate, 15 to 25 percent of butyl acrylate, 0.8 to 1.2 percent of methacrylic acid, 2.6 to 3.4 percent of complex emulsifying agent, 0.4 to 0.6 percent of sodium bicarbonate, 0.4 to 0.6 percent of potassium peroxydisulfate, 0.23 to 0.66 percent of nano TiO2, 0.5 to 1.0 percent of ammonia water, and 0.04 to 0.17 percent of mixture of silane coupling agent and oleic acid; and the method for preparing the pure acrylic emulsion modified by the inorganic nanoparticles comprises the following steps: modifying the nano TiO2; and then carrying out mixing, stirring and dispersing processes and the like on monomers and the modified nano TiO2 so as to obtain the pure acrylic emulsion. The pure acrylic emulsion modified by the inorganic nanoparticles has the characteristics of aging resistance, wash fastness, water resistance and alkali resistance, and has the advantages of simple preparation process, low price and no environmental pollution.

The invention relates to a method for preparing antistatic aqueous solution by the chemical oxypolymerization of 3, 4-ethylenedioxythiophene (EDOT), i.e., potassium peroxydisulfate is used as oxidizer, sodium polystyrene sulfonate aqueous solution is polymerized with the 3, 4-ethylenedioxythiophene and the antistatic aqueous solution with eminent performance is prepared after the most suitable proportion of all the monomers is determined. Being used as a coat, the antistatic aqueous solution prepared by adopting the method of the invention has low surface resistance (1*10<5>Omega / cm<2>), high mechanical strength, high visible light transmittance, and superior electrochemistry performance and thermal stability. The method is simple in operation and has low requirement on equipment.

The invention relates to a technique for modifying silk broadcloth functionally and discloses a water repellent and oil repellent finishing agent of the silk broadcloth, a preparation method and an application thereof. The finishing agent consists of an ethylene fluorine monomer, an emulsifying agent and water. The preparation method comprises the following steps that: the emulsifying agent is dissolved into water, the ethylene fluorine monomer is added drop by drop at a rotating speed of 11,000 to 12,000r / min to realize the emulsifying process so that the water repellent and oil repellent finishing agent of the silk broadcloth is obtained. A finishing solution is prepared according to the ratio that the ethylene fluorine monomer is 20 to 120 percent of the textile by weight, the grafting reaction is performed by taking potassium peroxydisulfate as an evocating agent, the soaping, washing by water and drying processes are performed to extract and to remove the autopolymer so that the silk broadcloth with the water repellent and oil repellent functions is obtained. The technique adopts the monomer direct grafting method, ensures that the modified silk fabric not only has perdurable water repellent and oil repellent properties but also has good tactile and strong ventilating property, greatly improves the service performance of the true silk, and widens the application of the real silk fabric to the textile and clothing industry.

The invention relates to a preparation method for a graphene based compound hydrogel modified with poly (N-isopropylacrylamide). The preparation method comprises the following steps: (1) at room temperature, adding graphite oxide in water, ultrasonically dispersing so as to form a graphite oxide aqueous solution, and then adding monomer N-isopropylacrylamide and trigger potassium peroxydisulfate,and ultrasonically dispersing under a nitrogen atmosphere, thereby forming a precursor solution; and (2) performing hydro-thermal reaction on the precursor solution, after the reaction, cooling the precursor solution to room temperature, and taking out a product. The preparation method is simple in process and short in reaction time, thereby being suitable for industrial production. The graphene based compound hydrogel prepared according to the preparation method has the advantages that the graphene is served as a three-dimensional network skeleton, the mechanical strength is high, the chemical stability is excellent, the conductivity is high, the reversible swelling / deswelling response to ambient temperature is achieved, the change in conductivity is triggered, and the application prospect in the fields of electronics, biomedicine, and the like is wide.

The invention relates to a preparation method and application of a zinc cobaltate / nickel oxide core-shell nanowire array. The method comprises the steps of mixing soluble cobalt salt, soluble zinc salt, ammonium fluoride, urea and water to obtain a uniform solution; after that, feeding the uniform solution into a reaction kettle, putting a clean substrate into the solution in the reaction kettle, and carrying out calcination to obtain the substrate on which a zinc cobaltate nanowire array grows; and mixing nickel sulfate, potassium peroxydisulfate and ammonia water, putting the substrate on which the zinc cobaltate nanowire array grows into the mixed liquid, and carrying out calcination to obtain the zinc cobaltate / nickel oxide core-shell nanowire array. The method is low in manufacturing cost, effective in implementation, feasible and applicable to industrialization; the zinc cobaltate / nickel oxide core-shell nanowire array obtained by the method has the advantages of being high in discharge capacity, rate capability, cycle performance, and the like when being used for preparing a negative electrode of a lithium ion battery.

The invention relates to a method for preparing polybutadiene rubber latex with extra large particle size, comprising the following steps: adding deionized water, sodium bicarbonate, sodium lauryl sulphate, potassium peroxydisulfate, dodecyl hydrosulfide, butyl acrylate and styrene into a reactor, carrying out replacement with nitrogen after stirring and emulsifying are started, heating, controlling the temperature to be 50-70 DEG C, polymerizing for 0.5-1 hour, then dropwise adding mixed monomers of styrene, methacrylic acid, butyl acrylate and OP-10, reacting for 1-4 hours, heating until the temperature is 70-85 DEG C, then stirring for 0.5-2 hours until the reaction is finished, and cooling and filtering to obtain a high polymer agglomerant; adding the high polymer agglomerant into polybutadiene rubber latex while slowly stirring for 1-60 minutes, and standing for 4 hours, thus the polybutadiene rubber latex with extra large particle size of 400-1000nm is obtained. The preparation process is simple, the agglomeration condition is mild, the agglomeration process is controllable, and the impact strength of an ABS (acrylonitrile butadiene styrene) finished product is greatly improved.

The invention provides a chemical-mechanical polishing composition containing (a) an abrasive selected from wet-process silica, alpha alumina, fumed alumina, ceria, zirconia, titania, and combinations thereof, (b) an oxidation catalyst, (c) a non-transition metal sulfate salt, (d) a complexing agent, (e) hydrogen peroxide, (f) a nonionic surfactant, (g) an anionic surfactant, and (h) water. The polishing composition has a pH of about 1 to about 5, and the polishing composition is substantially free of a peroxydisulfate salt. The invention also provides a method of chemically-mechanically polishing a substrate, especially a nickel-phosphorous substrate, by contacting a substrate with a polishing pad and the chemical-mechanical polishing composition, moving the polishing pad and the polishing composition relative to the substrate, and abrading at least a portion of the substrate to polish the substrate.

The invention discloses a method for removing polycyclic aromatic hydrocarbons in soil by using persulfate-calcium peroxide through compound oxidation, and belongs to the field of soil repairing. The method comprises the following steps: after sieving to-be-measured air-dried soil, mixing the soil with calcium peroxide evenly; then adding distilled water to obtain slurry; successively adding oxalate ions, ferrous ions and peroxydisulfate ions, and stirring uniformly to obtain slurry reaction liquid; then leaving the slurry reaction liquid standstill in a dark place so that the polycyclic aromatic hydrocarbons in the soil can be removed after reaction is finished. By the method, naphthalene, acenaphthylene, acenaphthene, phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]anthracene, a component as shown in the specification, benzo[b] fluoranthene, benzo[a]pyrene, dibenzo[a,b]anthracene, benzo[ghi] perylene and indeno[1,2,3-cd] pyrene in a complicated environment of the soil can be removed effectively, the removal rate of the polycyclic aromatic hydrocarbons is high, neutral pH of the soil can be maintained, acidized soil is improved, and a catalyst and a chelating agent are adopted, so that the removal effect and the removal efficiency are enhanced.

The invention relates to a method for preparing a cationic organic flocculant by using paper-making sludge. The method comprises the following steps: directly dissolving a raw material by using an alkali liquid, centrifuging to separate supernate, adjusting the pH value of the solution, putting into a reactor, heating till a certain temperature, adding potassium peroxydisulfate and ethylenediamine tetraacetic acid, introducing nitrogen, stirring to activate for certain time, further adding acrylamide and a dimethyl diallyl ammonium chloride solution to the reactor, continuously introducing nitrogen, stirring for reaction, subsequently pouring into acetone to separate out a reaction product, and drying the filter residue in vacuum, thereby obtaining a flocculant product. When the prepared flocculant is used for treating a simulation water sample, the addition amount is 2mg / l, the UV254 removal rate is about 85%, and the DOC removal rate is about 70%. The method is simple in process, low in equipment requirement and beneficial for industrial production and application, not only is reuse of paper-making wastes achieved, but also the prepared flocculant product is environment-friendly, free of toxicity and high in efficiency, and the water treatment cost can be lowered.

The invention relates to a flocculant for sewage treatment. The flocculant is prepared by compounding the raw materials of polyacrylamide, starch, sodium hypochlorite, sodium carboxymethylcellulose, sodium silicate, potassium peroxydisulfate, sodium sulfite and water. The prepared flocculant has the advantages of green and environmental protection, low cost, small addition amount, quick flocculation speed, little sludge, convenience and safety in use and the like.

The invention discloses a nano TiO2 modified styrene-acrylic emulsion and a preparation method thereof. The emulsion comprises the following components in percentage by weight: 15-24 percent of methyl methacrylate, 12-20 percent of styrene, 15-22 percent of butyl acrylate, 35-45 percent of water, 2-5 percent of methacrylic acid, 1.5-3 percent of octylphenol polyvinyl chloride (PVC) ether, 0.5-1 percent of sodium dodecyl benzene sulfonate (SDBS), 0.2-0.6 percent of sodium bicarbonate, 0.2-0.7 percent of potassium peroxydisulfate, 0.3-0.5 percent of ammonia water, 0.25-0.4 percent of nano TiO2 and 0.05-0.1 percent of gamma-methacryloyl trimethoxypropylsilane. The preparation method comprises the following steps of: firstly, modifying the nano TiO2; secondly, preparing a monomer mixed liquor; and finally, modifying the styrene-acrylic emulsion and the monomer mixed liquor by adopting nano TiO2 to prepare the nano TiO2 modified styrene-acrylic emulsion. The nano TiO2 modified styrene-acrylic emulsion has the characteristics of uniformity in dispersion and calcium ion stability and the advantages of water resistance, anti-aging property, scrubbing resistance, simple process, low price and no environmental pollution.

The invention discloses acrylamide / 2-acrylamido-2-methylpropane sulfonic acid sodium / cyclodextrin modified acrylamide (AM / AMPS-Na / MAM) copolymer serving as a fluid loss reducer for drilling fluid in oilfield, and a preparation method thereof, which can solve the problems of short cement paste thickening time, failure of an additive and high filter loss due to strata pressure and temperature rise. The technical scheme is that: the copolymer is prepared by polymerizing 83 to 85 percent of acrylamide AM, 15 to 16 percent of 2-acrylamido-2-methylpropane sulfonic acid sodium AMPS-Na and 1 to 2 percent of cyclodextrin modified acrylamide MAM. The preparation method comprises the following steps of: adding aqueous solution of the AM, solution of the MAM and solution of the AMPS-Na into a reaction container; adding ethylene diamine tetraacetic acid, potassium peroxydisulfate and sodium hydrogensulfite; and stirring uniformly, and reacting at the temperature of between 40 and 50DEG C for 5 to 6 hours under the protection of nitrogen to obtain the AM / AMPS-Na / MAM copolymer. The AM / AMPS-Na / MAM copolymer serving as a drilling fluid treating agent has high thermal stability, high temperature resistance, and better fluid loss reducing effect; the preparation method is simple and practicable, and the reaction conditions are mild; and the AM / AMPS-Na / MAM copolymer is used as the drilling fluid treating agent in the oilfield.

The invention provides maleic anhydride acidation chitosan salt / nature rubber graft copolymer and a preparation method thereof. The method comprises the following steps: adding stabilizing agent non-ionic surface active agents Peregal-O into concentrated natural rubber for maintaining the stability and the temperature rise of the nature rubber; regulating the pH value of the maleic anhydride acidation chitosan salt solution between 8 and 12; then, adding obtained materials into the nature rubber; adding triggering agents of one kind or two kinds of materials in benzoyl peroxide, tert-butyl hydroperoxide, azodiisobutyronitrile, sulphur, cumene hydroperoxide, potassium peroxydisulfate and N, N-methylene-bisacrylamide; carrying out stilling standing for 24 hours; adding activating agents of tetraethylenepentamine; continuously raising the temperature; carrying out reaction for 2 to 24 hours at the temperature between 60 and 125 DEG C; and obtaining the milky maleic anhydride acidation chitosan salt / nature rubber graft copolymer. The copolymer has good antibacterial property, good physiological activity, good hydrophilcity and good heat resistance performance, and further widens the application range of the nature rubber in the fields of medical sanitation and the like.

The invention relates to a production method of starch-based formaldehyde-free glue, which takes starch as a main material, uses epoxy chloropropane, styrene, a potassium peroxydisulfate aqueous solution, a polyvinyl alcohol aqueous solution, sodium dodecyl benzene sulfonate (SDBS), an ammonium persulfate aqueous solution, vinyl acetate, acrylamide, a borax aqueous solution, urea and tributyl phosphate as raw materials and takes a NaOH aqueous solution as a pH regulator; and the formaldehyde-free glue can be produced by four steps of: preparation of oxidized starch emulsion, activation, grafting reaction as well as complexing and cross-linking reaction, and can be used as a wood adhesive. The method is mild in reaction conditions, easy to control, high in storage stability and strong in water resistance, and does not release free formaldehyde, thus greatly improving the bonding strength of a starch adhesive.

The invention relates to water-based paint, which comprises the following raw materials by part by weight: 52 to 55 parts of water, 0.5 to 0.7 part of sodium dodecyl sulfate, 30 to 70 parts of emulsion or aqueous dispersoid resin, 0.8 to 1 part of ammonia water, 0.1 to 0.2 part of defoamer, 0.05 to 0.1 part of sodium acetate, 0.5 to 5 parts of germicide, 0.1 to 1 part of corrosion inhibitor and 0.1 to 0.2 part of potassium peroxydisulfate. The invention further provides a preparation method for the water-based paint. The water-based paint is non-poisonous and harmless and causes little pollution to the environment. A coating formed by applying the water-based paint has high brightness and excellent firmness and resistance to crack, is hard to a certain extent, contains few VOCs and no heavy metal and have the functions of antibiosis and both mold and rust prevention. Therefore, the water-based paint is environmentally friendly and safe.